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Finding the Fourth Proportional to 68,287.25, 102,430.88 and 53,319.67

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Solution

The fourth proportional to 68,287.25, 102,430.88 and 53,319.67 is: 79,979.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,287.25 : 102,430.88 = 53,319.67 : x
  2. Step 2: Convert to fraction form
    68,287.25/102,430.88 = 53,319.67/x
  3. Step 3: Cross multiply
    68,287.25x = 102,430.88 × 53,319.67
  4. Step 4: Simplify right side
    68,287.25x = 5,461,580,396.68
  5. Step 5: Solve for x
    x = 5,461,580,396.68/68,287.25
  6. Step 6: Final answer
    x = 79,979.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.